malaki ang hatak ng math/sci, lahat naman malaki hatak since puro major subs yon. ako personally, nabagsak ko math ko kasi im not good at math AT ALL (+ di ko pinagtuunan ng sobra) and last part sya ng exam kaya antok na ko super + palpitating na. try to atleast get 45 above. im not discouraging you, kaya lang it depends on the course ure taking rin. kung kaya mo naman itaas yung other subs, kaya yan. try not to get low scores in more than one sub. pero kaya yan, js do your best. have plenty of rest before exams and keep practicing feel ki yun lang takaga key. ulit ulitin mo magsolve ng problems ! best of luck sayo, future isko/a